What was the name of the Utopian experiment founded by George Ripley during the transcendentalist movement?

The correct answer is Brook Farm, which was an experimental community founded by George Ripley in 1841 in West Roxbury, Massachusetts. It was rooted in the principles of transcendentalism, which emphasized spiritual and intellectual relationships over materialistic values. Ripley and other reformers aimed to create a society that fostered intellectual and artistic development while also allowing for communal living and labor.

Brook Farm provided a unique environment where members could pursue individual artistic and intellectual interests while contributing to the community's agricultural needs. The experiment attracted some notable intellectuals of the time, including authors and philosophers, who believed that living in a communal setting could lead to personal improvement and social reform. However, the community ultimately faced financial difficulties and disbanded in 1847, though it had a lasting impact on American culture by contributing to the dialogue about individualism and community.

The other choices represent different Utopian movements and communities of the time, each with its own distinct characteristics and philosophies, but none were founded by Ripley or directly aligned with the transcendentalist movement in the same way as Brook Farm.